/Engine/Source/Developer/DerivedDataCache/Public/DerivedDataCacheInterface.h
Low Level Static Helpers.
static constexpr [FAsciiSet](API\Runtime\Core\Misc\FAsciiSet) ValidCacheKeyChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_$";